Home
Class 12
PHYSICS
Light with enrgy flux of 9 xx 10^5 W m^(...

Light with enrgy flux of `9 xx 10^5 W m^(-2)` falls of a non - refleting surface at normal incidence.If trhe surface has an area of `50 cm^2`,find average force exerted on the surface during an intervl of 10 minutes.How will the result get modified ,if the surface is a perfect reflector?

Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC WAVES

    MODERN PUBLICATION|Exercise EXERCISE|66 Videos

  • ELECTROMAGNETIC INDUCTION

    MODERN PUBLICATION|Exercise EXERCISE|146 Videos

  • FORCE ON A CHARGE

    MODERN PUBLICATION|Exercise EXERCISE|59 Videos

Similar Questions

Explore conceptually related problems

Light with an energy flux of 20W//cm^2 falls on a non-reflecting surface at normal incidence. If the surface has an area of 30cm^2 , the total momentum delivered (for complete absorption) during 30 minutes is:

Light with enregy flux of 18 W cm^(-2) ,find the average force the surface has an area of 20 cm^2 ,find the average force exerted on the surface during a 30 minutes time span.

A cuboidal has total surface area of 90cm^2 and its lateral surface area is 36m^2 . Find the area of the base.

A metal cuboid of mass 'M' kg rests on a table with surface are of 40cm^2 in contact with the table. The pressure exerted by the cuboid on the table surface is 10000 Pa. Value of m is (given that g = 10ms^-2)

It costs Rs 2200 to paint the inner curved surface of a cylindrical vessel 10 m deep. If the cost of painting is at the rate of Rs 20 per m^2 , find inner curved surface area of the vessel.

If the radius of two circular cylinders are in the ratio 2 : 3 and their heights are in the ratio 9: 10 . Find the ratio of their curved surface areas.

A plane surface having area of 0.5m^2 is placed inside a uniform electric field of strength 5xx10^3NC^-1 . Calculate its flux makes an angle of 30^@ with the direction of electric field.

A plane surface having area of 0.5m^2 is placed inside a uniform electric field of strength 5xx10^3NC^-1 . Calculate its fluxplane makes an angle of 60^@ with the direction of electric field.

A rectangular surface of sides 10cm and 15 cm is placed inside a uniform electric field of 25 V m^-1 , suh that normal to the surface makes an angle of 60^@ with the direction of electric field. Find the flux of the electric field through the rectangular surface.

MODERN PUBLICATION-ELECTROMAGNETIC WAVES-EXERCISE
  1. What are infra-red rays ?Write their two uses.

    Text Solution

    |

  2. Fill ups The ……………current is always equal to the conduction current.

    Text Solution

    |

  3. A parallel plate cpacitor has plates of area 0.32 m^2 ,which are separ...

    Text Solution

    |

  4. Fig.110 shows a capacitor made of two circular plates each of radius R...

    Text Solution

    |

  5. Fig.110 shows a capacitor made of two circular plates each of radius R...

    Text Solution

    |

  6. Fig.110 shows a capacitor made of two circular plates each of radius R...

    Text Solution

    |

  7. Figure shows a capacitor made of two circular plates each of radius 1...

    Text Solution

    |

  8. The wavelength of X-rays is 1 overset@A.Calculate its frequency.

    Text Solution

    |

  9. A radar trnsmitter genrates waves,whose frequency is 3 xx 10^9Hz.What ...

    Text Solution

    |

  10. The medium wave(MW) band coresponds to wavelength range 200 m to 625 m...

    Text Solution

    |

  11. Electromagnetic waves of frequency 5 xx 10^(14) Hz are passed through ...

    Text Solution

    |

  12. Electromagnetic waves of frequency 5 xx 10^(14) Hz are passed through ...

    Text Solution

    |

  13. Electromagnetic waves of frequency 5 xx 10^(14) Hz are passed through ...

    Text Solution

    |

  14. In a plane e.m. wave, the magnetic field oscillates sinusodially with ...

    Text Solution

    |

  15. In a plane e.m. wave, the magnetic field oscillates sinusodially with ...

    Text Solution

    |

  16. The electric field in a plane electromagnetic wave is given by Ey = 72...

    Text Solution

    |

  17. The electromagnetic waves of intensity 4.5 xx 10^(-3) W m^(-2) fall on...

    Text Solution

    |

  18. Light with enrgy flux of 9 xx 10^5 W m^(-2) falls of a non - refleting...

    Text Solution

    |

  19. The propagation vector of an electromagnetic wave is given by vec S...

    Text Solution

    |

  20. Show that average electric evergy density (uE) of electic field is equ...

    Text Solution

    |